The car did well afterwards for at least 3 days. Then the engine light came back on. Initial check was P218F code. Once it was turned off, the P2187 code came up on t 2004 Mazda 6 with P2187 Code I've got a 2004 Mazda 6 --2.3L 4 cyl. 5 spd. 108,000 miles The check engine light is on and the code pulled was P2187. The car runs fine--- I've P0130 definition: Oxygen Sensor Circuit Malfunction (Bank 1, Sensor 1) Issue Severity: MODERATE - Extended driving with this code can cause internal engine damage. Repair Urgency: Get this code fixed as soon as possible to avoid catalytic converter and exhaust system damage. Diagnosis: It is important to complete the entire diagnostic process Check Engine light is illuminated or blinking; Vehicle jerks or hesitates during acceleration; Reduced performance exhibited through rough idling, stalling, reduced fuel economy, and loss of power; How to Diagnose the P0303 Code. Most OBD-II codes have many possible causes. Because of this, diagnosing the exact cause will be a challenge. The P2181 diagnostic code is sent when your engine is operating either above or below the recommended temperature range. It is technically a diagnostic code regarding "cooling system performance The P0171 code indicates that the oxygen (O2) sensor on bank 1 sent a signal to the engine control module that the air-fuel mixture is too lean to be corrected. The O2 sensors have the ability to correct a fuel mixture of +-15%. If it needs to be corrected more than that, the P0171 code will be stored. When there are more than 14.7 parts air to 1 part fuel in the air-fuel mixture, a lean condition exists and code P2187 is triggered when this is noticed at idle on bank 1. (4 cylinder engines only have bank 1, if its a "V" configuration engine it is the bank with cylinder 1) The lean condition can be caused by a vacuum leak, which .

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